Economics Professors Are Well Aware of the Importance of Incentives

Multiple Choice

Economics professors are well aware of the importance of incentives.Which of the following situations shows the use of a positive incentive?

A) Students who show up late to class will not be allowed in the classroom.
B) Students who do not have a doctor's note will not be allowed to take an exam at a different time.
C) Students can choose whether they want to attend class-there is no attendance policy.
D) Students can choose to get a higher grade by doing extra credit work.
E) The professor decides to teach the class by reading out of the textbook to the entire class.